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CD IGNITION SYSTEM

Part No. 667S

4–12 Cylinder

Notice: This product is legal for sale or use only on vehicles which may never be used on highways.

designed for marine use.

GENERAL INFORMATION

an engine speed governor. The use of the RPM limiters is not recommended for

applications equipped with a catalytic converter. Similarly, forcing engine RPM

past the RPM limiter continuously for long sustained intervals can cause

problems resulting from fuel build up in the exhaust system that may adversely

affect the application.

Ignition Ballast Resistor / Loom Resistance Wire

of the factory ignition resistors or ignition ballast resistors in the wire from the

ignition switch. It is not necessary to install ignition ballast resistors as specified

by the instructions for the particular distributor.

Ignition Coils

Spark Plug Wires

YOU MUST USE suppression type (carbon core, spiral core) spark plug wire.

Ignition Wire. Suppression type spark plug wires prevent false triggering and the

possibility of premature ignition or accessory failures.

DO NOT USE solid core (copper core; stainless steel core) spark plug wire with

any electronic ignition system or accessory. Solid core spark plug wire is a

source of ignition noise, which can cause false triggering and premature ignition

or accessory failure.

Spark Plug Gaps

For street applications, use your engine manufacturer’s specifications. For racing

applications, start with your engine manufacturer’s specifications, then experi-

ment with the plug gap to achieve maximum performance.

Electric Welding

harnesses (if possible) before any welding is done on the vehicle.

External RPM Limiters

Mallory RPM Limiter Part Nos. 641-4, 641-6, 641-8, 642, 643 and 644 WILL

Systems. Turn the LIMIT RPM knob slightly past 11,000 to prevent the RPM

limiter from interfering with the tachometer’s other functions.

MOUNTING PROCEDURE

Step 1

Disconnect the battery (–) cable to cut power to the system.

Step 2

the unit away from hot engine components or extreme heat such as the exhaust

system and manifolds. Keep the unit away from moving devices, such as fans,

belts and linkages. The location must be dry. Moisture will damage components

inside the unit.

Step 3

Mounting to a flat surface with shock mounts

• Hold the unit in its mounting position and center punch the mounting pattern on

the mounting surface for drilling mounting holes. Drill mounting holes using a 9/

32" drill bit.

• Install the shock mounts into the bottom plate of the unit. Hold the unit in position

where it will be mounted.

• From the backside of the mounting surface, insert the washers and the 1/4-20

nylock nuts onto the shock mount studs. Tighten each nut until snug.

INSTALLATION INSTRUCTIONS

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FORM 1468 (REV. B) 9/00